The FLUKE-1773 is a three-phase power quality analyzer engineered for logging, troubleshooting, and analyzing power quality in electrical systems. It features four voltage inputs rated to 1000 V CAT III / 600 V CAT IV and four current inputs compatible with various flexible probes and clamps. The device complies with the IEC 61000-4-30 Class A standard, measures harmonics up to the 50th order, and stores data on 8 GB of internal memory which is expandable with a microSD card. Common applications include energy surveys and load testing, harmonic surveys, and investigating nuisance circuit breaker tripping.